menstruation and menstrual cycle
DESCRIPTION
this is a subtopic under chapter 5 reproduction and growth (Form 5)TRANSCRIPT
menstruation
&
Menstrualcycle
Menstruation&
Menstrual Cycle
1 LO1: Students should be able to describe what is menstruation
2 LO2: Relate menstruation with the menstrual cycle
3 LO3: State the hormones involve in the menstrual cycle
4 Assessment
MENSTRUATION & MENSTRUAL CYCLE
1 LO1: Students should be able to describe what is menstruation
2 LO2: Relate menstruation with the menstrual cycle
3 LO3: State the hormones involve in the menstrual cycle
4 Assessment
MENSTRUATION & MENSTRUAL CYCLE
1 LO1: Students should be able to describe what is menstruation
2 LO2: Relate menstruation with the menstrual cycle
3 LO3: State the hormones involve in the menstrual cycle
4 Assessment
• What is menstruation?
The breakdown of uterine lining (endometrium) that will be discharge/shed through the vagina with a small amount of blood and some cells
• When does it begin?
When a girl reaches puberty (11 to 15 years)
• How long does this process occur?
5 to 7 days
MENSTRUATION & MENSTRUAL CYCLE
1 LO1: Students should be able to describe what is menstruation
2 LO3: Relate menstruation with the menstrual cycle
3 LO3: State the hormones involve in the menstrual cycle
4 Assessment
THE MENSTRUAL CYCLE EXPLAINED BY DAY
MENSTRUATION & MENSTRUAL CYCLE
MENSTRUAL CYCLE
DAY 1MENSTRUATION
Blood & tissue
MENSTRUAL CYCLE
DAY 2MENSTRUATION
MENSTRUAL CYCLE
DAY 3MENSTRUATION
MENSTRUAL CYCLE
DAY 4MENSTRUATION
MENSTRUAL CYCLE
DAY 5MENSTRUATION
Bleeding last for about 5 days
MENSTRUAL CYCLE
DAY 6
Hormones
MENSTRUAL CYCLE
DAY 7
Follicle
MENSTRUAL CYCLE
DAY 8
Development of follicles
MENSTRUAL CYCLE
DAY 9
Development & maturation
MENSTRUAL CYCLE
DAY 10
MENSTRUAL CYCLE
DAY 11
Uterine lining thicken
MENSTRUAL CYCLE
DAY 12
Ready for embryo implantation
MENSTRUAL CYCLE
DAY 13
Blood and nutrient
MENSTRUAL CYCLE
DAY 14OVULATION
Hormones
MENSTRUAL CYCLE
DAY 14OVULATION
MENSTRUAL CYCLE
DAY 14OVULATION
MENSTRUAL CYCLE
DAY 14OVULATION
An egg is release!
MENSTRUAL CYCLE
DAY 14
Egg travel to the upper part of Fallopian tube
MENSTRUAL CYCLE
DAY 18
SPERM
MENSTRUAL CYCLE
DAY 19
SPERM
FERTILIZATION
MENSTRUAL CYCLE
DAY 20
ZYGOTE
MENSTRUAL CYCLE
DAY 21
ZYGOTE
MENSTRUAL CYCLE
DAY 22
ZYGOTE DEVELOP INTO EMBRYO
MENSTRUAL CYCLE
DAY 23
ZYGOTE DEVELOP INTO EMBRYO
MENSTRUAL CYCLE
DAY 24
EMBRYO IMPLANT ITSELF ON THE UTERINE LINING
MENSTRUAL CYCLE
DAY 27
IMPLANTATION IS COMPLETE!
WHAT IF THE EGG IS UNFERTILIZED?
MENSTRUAL CYCLE
DAY 14
Unfertilized egg
Hormones
MENSTRUAL CYCLE
DAY 25
Hormones
MENSTRUAL CYCLE
DAY 28
Hormones
AND SO THE CYCLE GOES ON …
MENSTRUAL CYCLE
DAY 1MENSTRUATION
Blood & tissue
MENSTRUAL CYCLE
DAY 2MENSTRUATION
AND ON …
1 LO1: Students should be able to describe what is menstruation
2 LO2: Relate menstruation with the menstrual cycle
3 LO3: State the hormones involve in the menstrual cycle
4 Assesment
For further explanation, click
MENSTRUATION & MENSTRUAL CYCLE
The Menstrual CycleFertilization ovum meets sperm in oviduct - no menstruation occurs (uterine lining will not break down) Day 0-5
Menstruation occurs - uterine lining break down - the unfertilized ovum is discharged through the vagina
Day 5-14 Before ovulation: uterine lining starts to thicken ( blood supply--> food & O2) prepare for fertilized ovum
Day 14 Ovulation occurs - not occur during pregnancy
Day 14-28 (or Day 0)
Uterine lining becomes very thick - ready to receive fertilized ovum
Fertilization ?
Yes
No
MENSTRUAL CYCLE
1 LO1: Students should be able to describe what is menstruation
2 LO2: Relate menstruation with the menstrual cycle
3 LO3: State the hormones involve in the menstrual cycle
4 Assessment
2 groups of hormone
Group 1Control
changes in the ovary
(development of ovum)
Group 2Control
changes in the uterus
(thickening of endometrium)
MENSTRUATION & MENSTRUAL CYCLE
1 LO1: Students should be able to describe what is menstruation
2 LO2: Relate menstruation with the menstrual cycle
3 LO3: State the hormones involve in the menstrual cycle
4 Assessment
GROUP 1
• Gonadotrophin releasing hormone (GnRH)
•Follicle stimulating hormone (FSH)
•Luteinising hormone (LH)
MENSTRUATION & MENSTRUAL CYCLE
Ova
rian
even
tH
orm
one
leve
lsOvarian cycle
Days
FSH
LH
1 LO1: Students should be able to describe what is menstruation
2 LO2: Relate menstruation with the menstrual cycle
3 LO3: State the hormones involve in the menstrual cycle
4 Assessment
GROUP 2
• Oestrogen
•Progesteron
MENSTRUATION & MENSTRUAL CYCLE
1 LO1: Students should be able to describe what is menstruation
2 LO2: Relate menstruation with the menstrual cycle
3 LO3: State the hormones involve in the menstrual cycle
4 Assessment
MENSTRUATION & MENSTRUAL CYCLE
For more assessment, click
Match the hormones with the right functions:
Stimulate growth of follicle in the ovary
Promotes repair and growth of the endometrium lining
Causes ovulation to occur
High levels inhibit FSH secretion and induce the endometrium to thicken and vascularise
Progesterone
LH
FSH
Oestrogen
TIMES (DAY) IN THE OVARY IN THE UTERUS
1-5 Primary Follicle develop
6-13 Graafian Follicle matures
14 Endometrium Continues To Thickens
15-24 Corpus Luteum develops
25-28 Endometrium begins to breakdown
Menstruation occur
Corpus Luteum degenerates if no
fertilisation
Endometrium become thicker. Many blood vessel is develop
in it
Ovulation occurs
Endometrium repaires and thickens
Click on the image according to the arrangement of follicle development from day 1 to day 28 of menstrual cycle
FOLLICLEDEVELOPMENT
End of assessment